It's not a big problem (because I can always burn them onto my textures :wink: ), but... is there a way to do it using the engine?

No, there isn't. You'll have to do it the "texture-way". I thought about shadows some weeks ago, but i ran into some problems (virtual ones...i didn't really implement something) with the software rasterizer. That, and they would be veeery slow in software. Maybe the upcoming support for OpenGL will make me re-evaluate this decision...but for now: No support for casting shadows, sorry.